WordPress get featured image programmatically code example

Example 1: get featured image url in wordpress

if ( has_post_thumbnail()) {
   $large_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'large');
   echo '<a href="' . $large_image_url[0] . '">';
   the_post_thumbnail('thumbnail');
   echo '</a>';
}

Example 2: wordpress featured image show

<?php echo the_post_thumbnail(); ?>